Intended to address the large quantity of used books that typically sit in bins outside a bookstore (too weird to profit from, too rare to recycle), the Biblio-Mat dispenses a random used book for $2. Like the Random Wikipedia Generator (click that link as many times as you want), it offers the pleasure of knowledge without the burden of choice.

For the price of a bottle of water, why not take your chances with the Biblio-Mat in a train station or an airport?